OpenAI Agents SDK
OpenAI's open-source SDK for building tool-using LLM agents that hand off to each other.
The OpenAI Agents SDK is an open-source framework (Python, TypeScript) for building agents from a small set of primitives: agents, tools (functions, web search, MCP servers), handoffs between agents, and guardrails that validate inputs and outputs. Its run loop handles tool calls and delegation, with built-in tracing to debug and evaluate every run. It's our choice when an application runs on OpenAI models and needs to move from an agent prototype to a readable multi-agent system.
What OpenAI Agents SDK brings to your project.
Typical use cases: Multi-agent assistants, automated customer support, research agents and tool-driven workflows.
- 01
Minimal primitives: agents, tools, handoffs, guardrails and sessions.
- 02
Native handoffs: one agent delegates to a specialist with no plumbing.
- 03
Input and output guardrails that validate or block, run in parallel.
- 04
Built-in tracing, hosted tools (web search, files) and MCP servers.
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Entrust your project to our
experts.
Entrust your project
to our experts.
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Startups, mid-caps, large enterprises, public sector: Kosmos supports organisations of every size in building their web, mobile and AI applications.















A project with OpenAI Agents SDK?
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